Electrical igniter for explosive-engines.



-No. 731,134. l PATENTED JUNE 16, 1903.

. C. E. SARGENT. ELECTRICAL IGNITER PO'RAEX-PLOSIVE ENGINES..

APPLICATION FILED Nov. a, 1900. No Holm.. 2 SHEETS-SHEET 1.

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C. E. SARG'ENT. ELECTRICAL IGNITER PDR EXPLOSIVE ENGINES.

APPLICATION FILED NOV. 3, 1900.

N0 MODEL. 2 SHEETS-SHEET 2.

ivo. 731,134.

UNITED STATES :Patented June 1e, 1903.

PA TENT Ormea.

CHARLES E. SARGENT, OF CHICAGO, ILLINOIS, ASSIGNOR OF THREE- FOURTHS TOOLIVER S. LYFORD, OF NEW YORK, N. Y.,`AND CHARLES I-IILLARD, TRUSTEE, OFCHICAGO, ILLINOIS.'

ELECTRICAL IGNITER FOR-EXPLOSlVE-ENGlNES.

SPECIFICATION forming part of Letters Patent No. 731,134, dated J une16, 1903. Original application tiled April 2'7, 1900, Serial No. 14,553.Divided and this application filed November 3, 1900. Serial To @ZZ whom,it may concern:

Be it known that I, CHARLES E. SARGENT, a citizen of the United Statesof America, re-

' siding at Chicago, in the countyr of Cook and State of Illinois, haveinvented certain new and useful Improvements in Electrical Igniters forInternal- Combustion Engines, of which the following is a specification.

My invention relates to certain improvements in electrical igniters forinternal-combustion engines'of theclass shown and described in myapplication for improvements in gas-engines, iiledAprilB?, 1900, SerialNo. 14,553, of which this application is a division.

The object of the invention is to produce an igniter or sparking devicewhich shall be more reliable and eective in operation and easier in itsmanipulation as to necessary repairs and care of the Working parts.

To such end the invention consists in certain characteristics which willfully appear in the following specification and claim.

In the drawings, Figure' 1 is a Vertical transverse section of acylinder taken through the igniter in the line 1 1 of Fig. 2. Fig. 2 isa side elevation of a portion ot` the cylinder and.

the igniteractuating devices. Fig. 3 is an enlargement of a portion ofsaid elevation, the'y parts in front of the plane 3 3V of Fig. 6 beingcut away and the push-bar oG being raised. Fig. 4 is a horizontalsection in line 4 4.of Fig. 2. Fig. 5 is a transverse detail section inline 5 5 of Fig. 4. Fig. 6 is a section similar to Fig. 5, with theparts in a dierent position. Fig. 7 isa Vertical detail section in line7 '7 of Fig. 1; and Fig. 8 is an end elevation of the block whichcontains the electrodes.

Referring to the drawings,.A represents the cylinder of aninternal-combustion Aengine, and B a rotating shaft adapted to carrysuitable cams to actuate'the valves and the igniter. YA block N (seeFig. 8) is let into the side of the cylinder, as seen in Figs. 1 and 4,terminating within the latter in the'valvechamber, and said blockcontains a rockshaft n, terminating at the inner end of the block in aconed enlargement n', seated in the block and bearing a wipingspring-arm n2,

(No model.)

in the block, the electrode being held within the bushing by means of ahead 03 at the inside end and a nut o4, bearing7 upon the outside end ofthe bushing. The electrode is cylindrical in form, so as to be rotatablein the bushing to bring new portions of its surface into contact withthe wiping-arm. The elasticity of the springarm causes the latter tobear with a yielding force upon the inner end of the electrode and makea perfect contact therewith. Upon the portion of the rockshaft n withoutthe cylinder is a coiled spring p, having one end p fastened in theblockN and the other end fast at p2 in a collar P, secured by aset-screw p3 to the shaft and adjustable both longitudinally andangnlarly upon. the latter. The spring p is put under 'torsional andlongitudinal tension, so as to draw thev coned end n of the rock-shaftto its seat and also to turn the wiping-arm n.2 away from the electrodeO. Upon the outer end of thefrock-shaft is securedy a crank-arm 05,(best seen in Fig. 2,) to the outer end of which is secured a push-bar06,- (see Fig. 5,) resting upon the igniter-operating cam d3. This endof the rock-shaft is pivoted in a bracket q, the lower part of which hasa slotted extension q', beveled at Q3, and a plate 07, secured to theside of the push-bar, is bent at an angle at o8 to engage this beveledpart of the bracket. The slot in the bracket extends backward from thepush-pin sufficiently to allow a limited movement of the latter in thebackward direction. TheV push-pin is raised by means of a lug d,inclined upon the for- -ward side With reference to the direction ofmovement ofthe cam and abrupt upon the rear side. This lug raises thepush-pin against the tension of the spring p to bring the wiping-arminto contact with the electrode, and as the push-pin rides off of thetop of the lug the contact is abruptly broken, causing the spark. Incase of a backward movement of the igniter-cam the push-pin is crowdedbackward by the lug d and is raised by the bent portion o8 of the plateo7 sutliciently to clear the top of the lug. The wiping-arm n2 issecured to the inner end of the rock-shaft by means of a sereW ns, so asto be removable therefrom for repairs or in case it needs to be replacedby a new one.

Looking at Fig. 3, a shoulder Will be seen on the lower portion of thepush-pin o6, which never rises to the position seen in Fig. 3 in theordinary Working of the engine. When it is desirable to cut the igniterout of operation Without disturbing the electrical connections, thepush-bar is raised sufficiently to engage this shoulder with theadjacent edge of the slot g', and while it remains in this positiou itis ont of reach of the actuating-cam d3. In moving the push-bar to thisposition the spring-arm of the igniter n2 is therefore swung.;` by theelectrode o, so that no current may pass While the sparking device isout of operation. This is of great advantage, as it offers an easy meansof stopping the waste of the current when it is not needed, and may beparticularly available in large engines containing a series ofexplosion-chambers, in

which it is desirable at times to operate one or more of theexplosion-chambers Without using the others.

I claim as new and desire to secure byLetters Patent- In an igniter, asnitably'supported rockshaft, a crank-arm thereon, a push-pin pivoted tothe crank-arm, a slotted guide for the push-pin having a beveledsurface, a beveled extension upon the push-pin fitted to said surface,au igniter-operating disk having a lug adapted to operate said push-pin,said lug being inclined upon the side corresponding to the beveledsurface and abrupt upon the opposite side and normally rotating towardthe inclined side of the lug, whereby the slotted guide permits thepush-pin to move away from the abrupt side of the lug and the .bev-

-eled surface raises it off of said lug; substantially as described. v

In Witness whereof I have hereunto set my hand, at Chicago, in thecounty of Cook and State of Illinois, this th day of October, A. I).1900.

CHARLES E. SARGENT. Witnesses:

CHAs. O. SHERVEY, S. BLISS.

